Platinum is used to catalyze the hydrogenation of ethylene:
H2(g) + CH2CH2(g) → CH3CH3(g)
Chlorofluorocarbon (CFCs) catalyze the conversion of ozone (O3) to oxygen gas (O2):
2O3(g) → 3O2(g)
Magnesium catalyzes the disproportion of hydrogen peroxide to produce water and oxygen:
2H2O2(aq) →2H2O(l) + O2(g)
What type of catalysts are platinum, CFCs, and magnesium under these conditions?
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